Definition of ring-porous in English:

ring-porous

adjective

  • Designating wood and trees, especially broadleaved hardwood species occurring in dry habitats, in which larger pores are produced in early wood and smaller pores are produced in latewood, resulting in conspicuous, alternating rings of larger and smaller pores when viewed in transverse section.

Origin

Late 19th century; earliest use found in Wood-worker.